/**
	This file is part of Fighting Field.

    Fighting Field is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Fighting Field is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Fighting Field.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef FF_TEXTBOX_H
#define FF_TEXTBOX_H

#include "Prerequisites.h"

#include "OgreTextAreaOverlayElement.h"

#include "Widget.h"

namespace Ogre
{
	class BorderPanelOverlayElement;
	class PanelOverlayElement;
}

namespace FF
{
	class TextBox : public Widget
	{
	public:
		struct Style
		{
			Ogre::String templateName;
		};
	public:
		// Do not instantiate any widgets directly. Use GuiManager.
		TextBox(const Ogre::String& name, const Style& style, const Ogre::DisplayString& caption, Ogre::Real width, Ogre::Real height);

		void SetPadding(Ogre::Real padding);
		Ogre::Real GetPadding();

		const Ogre::DisplayString& GetCaption();
		void SetCaption(const Ogre::DisplayString& caption);
		
		const Style& GetStyle() const { return mStyle; }

		const Ogre::DisplayString& GetText();
		void SetText(const Ogre::DisplayString& text);
		void SetTextAlignment(Ogre::TextAreaOverlayElement::Alignment ta);
		void ClearText();
		void AppendText(const Ogre::DisplayString& text);

		void RefitContents();

		void SetScrollPercentage(Ogre::Real percentage);
		Ogre::Real GetScrollPercentage();
		unsigned int GetHeightInLines();

		// callbacks
		void _OnCursorPressed(const Ogre::Vector2& cursorPos);
		void _OnCursorReleased(const Ogre::Vector2& cursorPos);
		void _OnCursorMoved(const Ogre::Vector2& cursorPos);
		void _OnFocusLost();

	protected:
		// Decides which lines to show.
		void FilterLines();

	protected:
		Style mStyle;
		Ogre::TextAreaOverlayElement* mTextArea;
		Ogre::BorderPanelOverlayElement* mCaptionBar;
		Ogre::TextAreaOverlayElement* mCaptionTextArea;
		Ogre::BorderPanelOverlayElement* mScrollTrack;
		Ogre::PanelOverlayElement* mScrollHandle;
		Ogre::DisplayString mText;
		Ogre::StringVector mLines;
		Ogre::Real mPadding;
		bool mDragging;
		Ogre::Real mScrollPercentage;
		Ogre::Real mDragOffset;
		unsigned int mStartingLine;
	};
}

#endif